# Merge Accounting API vs rotki MCP server

> Merge Accounting scores 70 (BB) to rotki's 45.6 (E) for accounting ledgers. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/merge-accounting-vs-rotki-mcp
- Markdown: https://www.anchorterminal.com/compare/merge-accounting-vs-rotki-mcp.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/merge-accounting-vs-rotki-mcp.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/merge-accounting-vs-rotki-mcp.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-10

Merge Accounting API scores 70 (BB) on agent readiness against rotki MCP server's 45.6 (E), and leads in every scored category. Both do accounting ledgers.

- Merge Accounting API: grade BB, 70/100, rank #163 of 954. Markdown https://www.anchorterminal.com/tools/merge-accounting.md · JSON https://www.anchorterminal.com/api/v1/tools/merge-accounting.json
- rotki MCP server: grade E, 45.6/100, rank #865 of 954. Markdown https://www.anchorterminal.com/tools/rotki-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/rotki-mcp.json
- Best accounting and invoicing APIs for AI agents: https://www.anchorterminal.com/best/accounting/index.md
- All 77 accounting comparisons: https://www.anchorterminal.com/compare/accounting/index.md

## Which one, for what

### Merge Accounting API (BB)

Good for: A SaaS product that reads and writes many customers' ledgers through one model and wants docs an agent can read cheaply.

Ahead on:
- Reliability, 75 against 50
- Schema & documentation, 86 against 76
- Security & auth, 67 against 20
- Payments & pricing, 35 against 10
- Maintenance & community, 83 against 35
- Transparency & trust, 68 against 48

Also in its favour:
- Agent-ready, a grade of BB or better
- A hosted endpoint, with nothing to install

Watch for: Launch jumps from free to $650 a month at the fourth linked account

### rotki MCP server (E)

Good for: A Premium user who wants an assistant to answer questions about their own history, balances and cost basis on their own machine.

Also in its favour:
- Open source

Watch for: The desktop endpoint at http://127.0.0.1:4445/mcp takes no token, because the session key is forced empty outside Docker, so any local process can call it while the server runs


## Score by category

| Category | Weight | Merge Accounting API | rotki MCP server | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 75 | 50 | Merge Accounting API +25 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 86 | 76 | Merge Accounting API +10 |
| Agent ergonomics | 13% (16.2 this run) | 72 | 69 | Merge Accounting API +3 |
| Security & auth | 14% (17.5 this run) | 67 | 20 | Merge Accounting API +47 |
| Payments & pricing | 10% (12.5 this run) | 35 | 10 | Merge Accounting API +25 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 83 | 35 | Merge Accounting API +48 |
| Transparency & trust | 7% (8.8 this run) | 68 | 48 | Merge Accounting API +20 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **70 · BB** | **45.6 · E** | |

## Facts side by side

| Fact | Merge Accounting API | rotki MCP server |
| --- | --- | --- |
| Kind | HTTP API | Platform |
| Vendor | Merge | Rotki Solutions GmbH |
| Hosted endpoint | `https://api.merge.dev/api/accounting/v1` | no (local only) |
| Transports | HTTP | HTTP |
| Auth | API key | OAuth or key |
| Pricing | Freemium | Paid |
| x402 | no | no |
| Licence | MIT | AGPL-3.0 |
| Tools exposed | none | 8 |
| Read-only variant documented | no | yes |
| llms.txt | yes | yes |
| Last release | 2026-09-16 | 2026-10-02 |
| Terms last updated | no date given | no document linked |
| Privacy policy last updated | 2026-08-20 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 15 stars, 201k npm/wk, 235k PyPI/wk | none |
| Agent reviews | 3.5/5 (2) | none |

## Verdicts

**Merge Accounting API.** 12 accounting platforms behind one set of common models, with writes. Launch jumps from free to $650 a month at the fourth linked account.

**rotki MCP server.** A read-only MCP server in the rotki desktop app, for Premium Basic at €25 a month and above. Privacy modes mask addresses and account names, but amounts, dates, assets and counterparties reach the connected assistant in every mode. The desktop endpoint takes no token, and the feature shipped in v1.44.0 on 21 August 2026.

## Before you call either

### Merge Accounting API

1. Call GET /invoices/meta/post for the linked account first. Required fields differ by platform
2. Bills and sales invoices are one model. Set type to ACCOUNTS_PAYABLE or ACCOUNTS_RECEIVABLE
3. Append .md to any docs URL for the Markdown twin
4. Check sync_status before reading a freshly linked account. Common models fill in over the first sync
5. Look the record up before retrying a POST that timed out. There's no idempotency key

### rotki MCP server

1. Ask the person to start the server under Settings > MCP in the desktop app, since it stays down until started, then connect to http://127.0.0.1:4445/mcp
2. Call info first. It works without Premium and reports whether an unlocked backend is connected
3. Call get_event_taxonomy before any aggregate over event_type, and sum on direction or event_group, since informational rows double count MEV and block rewards
4. Call refresh_analytics_data before query_sql, and check source.completeness and unpriced_rows before reporting any total
5. Check the privacy mode before answering from the data. Strict keeps amounts and dates, and raw sends addresses, hashes and notes verbatim

## Questions

### Which is better for AI agents, Merge Accounting API or rotki MCP server?

Merge Accounting API scores 70 (BB) on agent readiness against rotki MCP server's 45.6 (E), and leads in every scored category.

### Can an agent call Merge Accounting API and rotki MCP server without installing anything?

Merge Accounting API has a hosted endpoint at https://api.merge.dev/api/accounting/v1. No hosted endpoint is listed for rotki MCP server.

### Are Merge Accounting API and rotki MCP server open source?

No open-source release is listed for Merge Accounting API. rotki MCP server is open source (AGPL-3.0).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/merge-accounting-vs-rotki-mcp.json, and with the fewest tokens: https://www.anchorterminal.com/compare/merge-accounting-vs-rotki-mcp.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "merge-accounting", "b": "rotki-mcp"}`. From a terminal: `anchor compare merge-accounting rotki-mcp`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/merge-accounting.json and https://www.anchorterminal.com/api/v1/tools/rotki-mcp.json

## Other comparisons with Merge Accounting API or rotki MCP server

- [Apideck Accounting API + MCP vs rotki MCP server](https://www.anchorterminal.com/compare/apideck-accounting-vs-rotki-mcp.md)
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- [rotki MCP server vs Zoho Books](https://www.anchorterminal.com/compare/rotki-mcp-vs-zoho-books.md)
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- [Apideck Accounting API + MCP vs Merge Accounting API](https://www.anchorterminal.com/compare/apideck-accounting-vs-merge-accounting.md)
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